Face mask



FIG. 1 is a left-side elevation view of a face mask showing my new design;

FIG. 2 is a front elevation view thereof;

FIG. 3 is a bottom plan view thereof;

FIG. 4 is a right-side elevation view thereof;

FIG. 5 is a top plan view thereof;

FIG. 6 is a rear elevation view thereof; and,

FIG. 7 is a perspective view thereof, the person shown in broken lines forms no part of the claimed design. 

I claim the ornamental design for a face mask, as shown and described. 